private UsingDirectiveSyntax QualifyUsingDirective(UsingDirectiveSyntax usingDirective)
{
NameSyntax originalName = usingDirective.Name;
NameSyntax rewrittenName;
switch (originalName.Kind())
{
case SyntaxKind.QualifiedName:
case SyntaxKind.IdentifierName:
case SyntaxKind.GenericName:
if (originalName.Parent.IsKind(SyntaxKind.UsingDirective) ||
originalName.Parent.IsKind(SyntaxKind.TypeArgumentList))
{
var symbol = this.semanticModel.GetSymbolInfo(originalName, cancellationToken: CancellationToken.None).Symbol;
if (symbol == null)
{
rewrittenName = originalName;
break;
}
if (symbol is INamespaceSymbol)
{
// TODO: Preserve inner trivia
string fullName = symbol.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat);
NameSyntax replacement = SyntaxFactory.ParseName(fullName);
if (!originalName.DescendantNodesAndSelf().OfType <AliasQualifiedNameSyntax>().Any())
{
replacement = replacement.ReplaceNodes(
replacement.DescendantNodesAndSelf().OfType <AliasQualifiedNameSyntax>(),
(originalNode2, rewrittenNode2) => rewrittenNode2.Name);
}
rewrittenName = replacement.WithTriviaFrom(originalName);
break;
}
else if (symbol is INamedTypeSymbol)
{
// TODO: Preserve inner trivia
// TODO: simplify after qualification
string fullName;
if (SpecialTypeHelper.IsPredefinedType(((INamedTypeSymbol)symbol).OriginalDefinition.SpecialType))
{
fullName = "global::System." + symbol.Name;
}
else
{
fullName = symbol.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat);
}
NameSyntax replacement = SyntaxFactory.ParseName(fullName);
if (!originalName.DescendantNodesAndSelf().OfType <AliasQualifiedNameSyntax>().Any())
{
replacement = replacement.ReplaceNodes(
replacement.DescendantNodesAndSelf().OfType <AliasQualifiedNameSyntax>(),
(originalNode2, rewrittenNode2) => rewrittenNode2.Name);
}
rewrittenName = replacement.WithTriviaFrom(originalName);
break;
}
else
{
rewrittenName = originalName;
break;
}
}
else
{
rewrittenName = originalName;
break;
}
case SyntaxKind.AliasQualifiedName:
case SyntaxKind.PredefinedType:
default:
rewrittenName = originalName;
break;
}
if (rewrittenName == originalName)
{
return(usingDirective);
}
return(usingDirective.ReplaceNode(originalName, rewrittenName));
}